Deglazing Test

The deglazing procedure is as follows:

1. Check the print review to determine the correct structural sealant contact width and thickness as recommend by GE Silicones
2. Check the adhesion test report by GE Silicones to determine the recommended cleaning solvent and primer
3. Record the project name, frame and glass identification numbers and the type of surface finish
4. Record the batch codes of the recommended primer and grade of structural sealant in the Deglazing Test Record Sheet
5. Record the number of days since the sealant has been applied and the temperature and relative humidity in the factory. Check that there is sufficient cure time before proceeding with the deglazing test
6. Make a cut through the silicone sealant at the perimeter of the unit, leaving approximately 2mm to 3mm thickness of silicone on the substrate. Exercise caution so as not to damage the substrate finish in any manner, which could potentially interfere with the re-glazing later.
7. Remove the glass by using a group of suction cups or similar method
8. Remove or cut the internal gasket/tape around the perimeter of the aluminium unit such that the edges of structural sealant contact width are not adhering to any gasket or spacer tape
9. Cut a tab of sealant from the substrate large enough for the fingers to exert a pulling force from
10. Pull the open end of the bead 180 backwards with force and check the sealant adhesion on the substrate. If the sealant adhesion is good (>85%), cut across the bead and pull again. Check for adhesion and repeat process for the entire frame.
11. If the adhesion is not good (<85%), stop glazing and trouble shoot all the glazing process to identify and solve the problem. Call GE Silicones representative for assistant
12. Records the results for each frame noting the percentage sealant adhesion on the substrate. Not any bubbles or voids within the sealant
13. Records any other relevant comment such as new applicators, new glaziers, factory cleanliness, etc
14. Repeat the deglazing process on the glass substrate
15. The test area can be repaired with GE UltraGlaze SSG4400 or GE UltraGlaze SSG4800J/4000